Cita APA (7th ed.)

Gregory, J. S., & Horrabin, J. (1946). Land of the Soviets: By James S. Gregory. Penguin Books.

Cita Chicago (17th ed.)

Gregory, James S., i J.F Horrabin. Land of the Soviets: By James S. Gregory. Harmondsworth;New York: Penguin Books, 1946.

Cita MLA (8th ed.)

Gregory, James S., i J.F Horrabin. Land of the Soviets: By James S. Gregory. Penguin Books, 1946.